Tektronix, Type R5440, Oscilloscope System (fig. 1-27) is a versatile 50-MHz general purpose, plug-in oscilloscope. It
features crt readout of plug-in scale factors and a 3 plug-in mainframe.
Crt readout displays plug-in scale factors on the crt, so measurement time and operator errors are reduced by taking into
account magnifiers and probe attenuators. It can also be accessed externally.
The wide variety of plug-ins available allows the oscilloscope to meet the demands from a single-trace, single time-base
configuration to 4-trace for transducer measurements, to dual-trace, delayed sweep for general purpose measurements.